<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>

<body>
    <div id="app"></div>
    <script type="text/babel">
        class Parent extends React.Component{
            render() {
                return <h1>标题:我是你爸爸</h1>
            }
        }

        class Child extends React.Component{
            render() {
                return <p>我是你爷爷</p>
            }
        }

        class App extends React.Component{
            render() {
                return (
                    <div>
                      <Parent /> 
                      <hr /> 
                      <Child />
                      <p>都给我闭嘴,回家!别丢人现眼!!!</p>  
                    </div>
                )
            }
        }

        const root = ReactDOM.createRoot(document.getElementById("app"))
        root.render(<App />)
    </script>

</body>

</html>